Street-sweeper.



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. STREET lSWEHIBR.

PPLIOATIUI FILED IUB 5. 190B.

l s .Uff/(l H.W.L1BBRTY aw. J. MCBLROY.

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E. w, LIBRTY al w. J. MCELROY.

STREET SWEEPBR.

APPLICATION TILL? JUHE 1908.

In v @n1-07151 'Witwe-55m )Samara WLan-gf,

Patented 061;.5, 1909. Y,

3 SHEETS-SHEET 2.

.. EDWARD W. LIBERTY, F CHICAGO,

UNITED 'strinse iATENT oreion- Nn WILLIAM J. MCELBOY, vor nopwNEns GROVE,

ILLINOIS. 1

. STREET-SWEEQER.

Specication of Letters Pxtent.

'Application ledlune 15,' 1908. inria) No. 436,&14.

means whereby :i street-sweeping machine may fnot only perform .its ordinary function oi sweeping, butl to convey ythe dust automatically lto A:i suitable receptacle in the machine.

haust. -fiiii and pipe system in a sti-eet y sweeper arranged in such amannei thabthe n dust muy be conveyed automatically to a and' also-consists in a power plant installed .inthe .machine adapted to furnish power for. the .exhaust sian .and for propelling the:

receptacle also provided in the machine,

machine.

Our invention further consists in details of construction .which will be hereinafter@ clearly set. forth. The preferred I:form of our invention is I illustrated in the accommnying drawings forming a part. of this specification, and inZ which, y

Figure .1:is u side elevation. F ig. 2 is a horizontal section taken siibstiintinllyon the line z/-y of Fig. l, the steering .wheel being shown in elevation, Fig. 3 'is detail top elevation, :ind Fig. 4 is n detail side elevation.

The sweeper is preferred to be powerdriven as shown but with slight modifications it may be horsedrawn if desired.

Referring to the drawings l indicates a body preferably of sheet metal construction mounted on the wheels 3, 4, 5 and 6 by ine-i1 ns of the springs 8, 9 and 10. Steering wheels 3 and 5 are pivoted to the front. axle 11' by meiins of the steering knuckles 12,

which knuckles` are pivoted to the connecting .At @le rear of the body l nrerenrwer-iiy .extending .'obliqiiely Qur invention consists m providing'an e.x-.

' adapted to drive the sprockets and outwardly extending :irnis 1S provided with vertii'iilly disposed eyes 1'.) in which the downwardly extending members 2() :ire adapted =to reciprix'zite. ties .of the members 20 ure provided with shaft 2 2. y

23 isthe cylindrical brush which together with its slinfti?? is adapted to rotate. The .spiral springs 24- surrounding the nii-mixers 2.0 :1nd interposed between ihebeiiriiigs 21 form :i yielding connection wherehythe brush 23 iiiiiy ndzipt itself to uneven conditions ofthe roadbed. A brush 'housing :'25 joiirnnled to the shaft- 22 :it the points 2G isndnptedto partially inclose the brush '23 and is-provided `#with .two pipes 2T from the lower front portion tliereofwhichpipes meet :it the point 28. Iln the pipesl 2T :i flexible joint provided which consists in the end of one portion being :loosely .thrustinto the end of ,the other portion of the pipe, this provision being necessary in order that the housing 25 :inyonove Yerticnlly with the brush Q3. A centrifugal fan is rotatably mounted in the .fan housing :il -to which vthe pipes 27 dead. A-piilley B2 secured to the shaft 33 of :the fun is :ida ted to be driven'by the belt which boites driven hy the pulley 35.

Rotiitzibly :ind trziiisversely mounted in -the benrings' is the shaft 37 carrying the vpulley Biind adapted tobe -belt 3S by means of the pulley 3f) secured-to the shaft il?. Thebelt 3S is adopted to be driven by thepulley 40 secured to the motorslint 41. iThe motor .water and zfiielitanks 43.and 44 respectively, und the usual engine accessories. The shaft- 3'4' is provided with chain sprockets 68 adapted to drive chains 69. The chains Gf) are 60 which are rigidly secured to the propelling wheels 4 und 5. The shaft 61 is arranged transversely and rotatably mounted in the hearings (l2. Sprockets 63 are secured to the shaft 61 und are Aadapted to drive same with the chains 69. The upper portions of the chains 69 are in constant tension when quently form e positive drive for the shaft sprockets 63. The sprockets' 64 are rigidly fixed to the extremities .of' the. shaft 61 and rammed oci.. 5,1A909.

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The lower exti'cniibearings 21 adapted jto .receive the brush I the :n'nis 18 :indv

driven by the A2 yis provided with by engagement the vehicle is moving forward and conse-f 61 oy engaging with the lower portion ofthe are adapted to drive chains which in turn 11o.

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drive the Abrush shaft sprockets 46. The propeiling wheels 4 and 5 are rotatably mounted on the rear axle 47, und the sprockets (Si) are secured tovsaid wheel through the medium of 5 members 48.'

The operation of the machine is as follows: The motor 42 is obviously adapted to propel the machine and to drive the faul-y). he fan 30 creates a suction which draws the dust from the 'roadbcd and conveys it through pipes 27, the fan housing 31 and the pipe 49, to the cyclone 50. The function of the cyclone 50 is to dissipate the force of the draft, and consequently to permit the dust 1.5 to fall' into the receptacle 51. The cyclone 5U 'is clearly shown in .l"ig. l, consisting of an annular chamber surrounding the central tube As the dust enters the cyclone in a direction tangent. to the annular space, a. 2o spiral motion is produced effecting the desired dissipation of draft.

The side door :33 is provided for the purpose of unloading.7 the dust f rom the receptacle 51 and liined' and adapted to swing downwardly on a horizontal axis. Y

58 is a door handle and 59 and 70 are respectively right and left locking members whose action is indicated by dotted lines.

The pipe 49 is provided with telescopic l joints 71 and 72 in its vertical and horizontal portions respectively. The joint 71 is adapted to permit the horizontal portion on the ipc 4S) to be raised to clear the cyclone 50 rom the cover 57 and to swing h orizontally to a rearward position as shown by dotted lines in Figs. 3 land 4., in order that the cyclone may connect with a separate carriage or trailer containing-a dust recep tacle if desired.

40 73 is a bracket adapted to support the pipe 49. I

Having described ,our invention what we claim ns new, and desire to secure by Letters Patent, is:

45 l. ln a street. sweeper, in combination with a wl'ieeled vehicle; a motor' suitably mounted in said vehicle, means for steering said vehicle, a suitable power transmission means connecting ,said motor and the vehicle'- propelling wheel, rearwardly and outwardly 5u extending arms on. said vehicle, eyes' at theterminals of said arms, members ada ted tov reciprocaue vertically through sai eyes, means exerting yielding resistance to the upward movement of said members in said eyes, a cylindrical brush rotatably mounted A,

in said members, and power transmission means from said motor to said brush, substantially as described. f

2. In a street sweeper, in combination with a wheeled vehicle, a motor, suitably mounted insaid vehicle rearwardly and outwardly extending arms on said vehicle, eyes at the ends of said arms, members adapted -to reciprocate vertically through said, eyes, a brush rotatably mounted in said members, means for yieldingly holding said brush in contact with the ground, power trans...is-' sion means from said motor' to vsaid brush, a fan in said vehicle for drawing the swecpings upwardly and depositing them in the vehicle a brush housingl and a flexible con; duit from said housingto said fan; substantially as described. 3. In a street sweeper, a wheeled vehicle 75 and a rotary brush mounted thereon means for rotating said brush, a fan and fan housing, a conduit leading from adjacent said brush to said fan housing, a receptacle for the swecpings arranged in the upper part of said vehicle, and a conduit leading fronr said housing to said receptacle, said conduit comprisingA a .vertically extending portion and a horizontally disposed upper portion, said vertically disposed portion being vided with a telescopic and swiveled joint and said upper portion being provided with a telescopic joint, substantially as described.

1n testimony whereof 'we have signed our naines' t this specification in the presence of 90 two subscribing witnesses. f l EDWARD W. LIBERTY.

1lf'lLlllAiWl J. MclLltOY. 'in iesses:

llenas l". Linus, Janin" l'l. Homie.

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